[X86][SSSE3] Added examples of target shuffle combining failing to match undefs in...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@273097 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/X86/vector-shuffle-combining-ssse3.ll b/test/CodeGen/X86/vector-shuffle-combining-ssse3.ll
index e6b46c4..54af924 100644 (file)
--- a/test/CodeGen/X86/vector-shuffle-combining-ssse3.ll
+++ b/test/CodeGen/X86/vector-shuffle-combining-ssse3.ll
@@ -137,6 +137,34 @@ define <16 x i8> @combine_pshufb_psrldq(<16 x i8> %a0) {
   ret <16 x i8> %2
 }
 
+define <16 x i8> @combine_pshufb_as_unary_unpcklbw(<16 x i8> %a0) {
+; SSE-LABEL: combine_pshufb_as_unary_unpcklbw:
+; SSE:       # BB#0:
+; SSE-NEXT:    pshufb {{.*#+}} xmm0 = xmm0[0,u,u,1,2,2,3,3,4,4,5,5,6,6,7,7]
+; SSE-NEXT:    retq
+;
+; AVX-LABEL: combine_pshufb_as_unary_unpcklbw:
+; AVX:       # BB#0:
+; AVX-NEXT:    vpshufb {{.*#+}} xmm0 = xmm0[0,u,u,1,2,2,3,3,4,4,5,5,6,6,7,7]
+; AVX-NEXT:    retq
+  %1 = tail call <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8> %a0, <16 x i8> <i8 0, i8 undef, i8 undef, i8 1, i8 2, i8 2, i8 3, i8 3, i8 4, i8 4, i8 5, i8 5, i8 6, i8 6, i8 7, i8 7>)
+  ret <16 x i8> %1
+}
+
+define <16 x i8> @combine_pshufb_as_unary_unpckhwd(<16 x i8> %a0) {
+; SSE-LABEL: combine_pshufb_as_unary_unpckhwd:
+; SSE:       # BB#0:
+; SSE-NEXT:    pshufb {{.*#+}} xmm0 = xmm0[8,9,8,9,10,11,10,11,12,13,12,13,14,15,u,u]
+; SSE-NEXT:    retq
+;
+; AVX-LABEL: combine_pshufb_as_unary_unpckhwd:
+; AVX:       # BB#0:
+; AVX-NEXT:    vpshufb {{.*#+}} xmm0 = xmm0[8,9,8,9,10,11,10,11,12,13,12,13,14,15,u,u]
+; AVX-NEXT:    retq
+  %1 = tail call <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8> %a0, <16 x i8> <i8 8, i8 9, i8 8, i8 9, i8 10, i8 11, i8 10, i8 11, i8 12, i8 13, i8 12, i8 13, i8 14, i8 15, i8 undef, i8 undef>)
+  ret <16 x i8> %1
+}
+
 define <16 x i8> @combine_unpckl_arg0_pshufb(<16 x i8> %a0, <16 x i8> %a1) {
 ; SSE-LABEL: combine_unpckl_arg0_pshufb:
 ; SSE:       # BB#0: